Vin Diesel has taken to Twitter for a second time to tease his casting in Marvel’s Inhumans movie.  Posting a picture of himself wearing an Inhumans t-shirt, the banner behind him asks "Are you inhuman?"
 
Inhumans was recently added to the official Marvel movie slate, with a planned release date of November 2, 2018 (see "'Inhumans' Movie").  A script is being prepared, and Diesel has previously broadly commented on the planned plot and his role (see "Marvel Planning 'Inhumans' Movie").

Marvel also appears to be preparing a publishing event that incorporates the Inhumans, for Summer 2015 (see "More Marvel Teasers for Summer 2015").